LM3481: LM3481 UVLO pin

Gitika Pandey

Part Number: LM3481

This is regarding use of UVLO pin in LM3481 controller IC. The resistor divider network is connected as shown below:

In datasheet of LM3481, UVLO pin specificationis as below:

In our application Vin varies from 9-36V.

1. Is there any internal circuitry to limit UVLO pin voltage to 6V?

2. What is the maximum current limit for UVLO pin.

0 dehuan Qi over 2 years ago

As it is during Thanksgiving in the United States, the reply may be delayed, , thank you for your patience.

0 Richard Fu22 over 2 years ago

Hi Gitika,

Apologies for the delay, I'm sorry this was slipping.

1) UVLO pin has ESD to prevent damage. This limits the maximum voltage at the pin to 6V.

2) UVLO pin is high impedance, so the pin does not draw much current.

Thanks,

Richard

Power management forum